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Feb. 27, 1962
3,022,678
J. R. MccoRmc
TUNNEL MOUNTED GEARSHIFT
3 Sheets-Sheet 1
Filed Jan. 26, 1960
INVENTOR.
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Feb. 27, 1962
3,022,678
J. R. MGCORDIC
TUNNEL MOUNTED GEARSHIFT
3 Sheets-Sheet 2
Filed Jan. 26, 1960
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Feb. 27, 1962
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TUNNEL MOUNTED GEARSHIFT
3 Sheets-Sheet 3
Filed Jan. 26, 1960
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United States Patent-Q "
1
3,022,678
TUNNEL MOUNTED GEARSHIFT
James R. McCordic, Royal Oak, Mich, assignor t0
Chrysler Corporation, Highland Park, Mich, a corpo
ration of Delaware
Filed Jan. 26, 1960, Ser. No. 4,814
1 Claim. (Cl. 74-473)
3,922,678
Patented Feb. 27, 1962
2
FIGURE 5 represents a top view of the linkage mecha
nism of FIGURE 2;. and
FIGURE 6 represents a view of the resilient mount
ing of FIGURE 2 taken along the line 6-6 thereof in
the direction of the arrows.
Referring to the drawings an automotive transmission
10 of the type, for example, shown in Patent No. 2,299,
889 is provided with a second-high shifting arm 12 and
a low-reverse shifting arm- 14 connected respectively to
This invention relates to a manually operable gear
the second-high gear train shifting yoke and the low
10
shift mechanism and mounting therefor for use in com
reverse train shifting yoke of the transmission 19. In
bination with a manually shiftable transmission of an
the conventional manner, the rotation of each of these
automotive vehicle, such as the transmission shown in
shifting arms 12 and 14 will result in a movement of the
Patent 2,299,889.
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shifting yokes associated therewith into their proper gear
The present invention provides a novel type of trans
mission shifting mechanism comprising a- hand shift lever 15 shifting positions.
A manual shifting device 16 comprises a hand shift
and gear train selecting levers engageable thereby and
ing
stick 18 mounted on a universal joint comprising a
operably connected to shifting arms mounted on the
hollow shaft 29 provided with oppositely positioned trun
transmission and extending thereinto to engage gear shift
nions 22 and 24 threaded into depending legs 28 and 3!}
ing yokes. The gear train selecting levers are'pivotally
of lever 18 and pivotally mounted in the boss 26 on shaft
20
mounted on the same support that the hand lever is
20. Shaft 20 is rotatably mounted on a pair of sleeve
mounted on. Each selecting lever is provided with up
bearings 32 and 33 secured to opposite ends of a shaft
standing portions substantially parallel to and lying on
34 which is secured by lock washers between legs 35 and
either side of the hand lever and engageable therewith,
36 of support means 37 bolted to the vehicle ?oor. A
and is also provided with depending portions extending
below their pivot axis oppositely to the upstanding por 25 tolerance takeup spring 38 may be provided between a
leg of the support 37 and the universal joint structure.
tions and are connected to the proper gear train shift
Sleeve bearings 39 and 40 are mounted on opposite ends
ing arms on the transmission.
of
shaft 26 and rotatably support shafts or collars 41 and
A novel feature of this invention is that the hand
42 respectively to which selecting levers 43 and 44 are
lever is provided with a means which can simultaneously
secured for rotation therewith.
engage both of the selecting levers at the neutral posi
It is seen, therefore, that levers 43 and 44 are free to
tion of each. This feature allows the adjustable linkage
pivot on shaft 2%) which is free to pivot on shaft 34.
connecting the selecting levers to the shifting arms to be
Moreover, lever 18 is pivotal around shaft 34 and on
properly set in the neutral position by merely placing
trunnions 22 and 24 to thereby provide a universal joint
the hand lever means into engagement with each of the
for lever 18 allowing 360° angular movement of a
selecting levers and thereafter adjusting the linkages to
limited extent.
place the gear shifting yokes of the transmission in their
Lever 18 is provided with m interconnecting shoulder
neutral position.
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means
or pin 43 secured to lever 18 by suitable means
Another advantage of this feature is that each of the
59, which pin 48 is movable into and out of slots 52
selecting levers must be brought to its neutral position
and 54 in levers 43 and 44 respectively. It is seen that
before the hand lever means is disengageable therefrom
when
the lever 18 is in substantially the straight up and
and thereafter engageable with the other selecting lever.
This feature prevents partial simultaneous engagement
down position, pin 48 will be engaged in both slots 52
and 54, and when this condition occurs the gear trains
in the transmission are in neutral condition. A spring
train.
A further feature of this invention is the provision of 45 56 is provided to constantly urge the hand lever 18 into
engagement with slot 54 in lever 44 which lever is opera
a resilient mounting for the second-high linkage connect
of the second-high gear train and the low-reverse gear
tively connected to the second-high gear train shifting
ing the second-high shifting arm to the second-high select
arm 12.
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ing lever, which mounting prevents motor and transmis
Sealing cowl-section 58 is placed over the gear shifting
sion vibration being transmitted to the second-high select
mechanism to protect it'from the elements, and is se
ing lever and hence to the hand lever.
50 cured on top of carpeting or ?oor board 59 by screws
It is therefore, a principal object of this invention to
60 which are screwed into the metal floor 62. Sealing
provide a relatively simple and inexpensive manual gear
cowl 61 through which extend levers 43 and 44 is clamped
shifting mechanism which is provided with the aforesaid
between support means 37 and ?oor 62.
‘features and which prevents simultaneous engagement of
Lever 43 is pivotally mounted at its lower portion on a
the two gear trains, provides for easy initial setting of
stud 63 extending from a threaded bushing 64 threadably
the shifting yokes and the selecting levers, and eliminates
receiving the low-reverse linkage 66. The end of link
motor and transmission vibration at the hand lever.
66 is threaded at 68 and is provided with nut 70 located
Further objects and advantages of the present inven
adjacent bushing 64 for locking lever 43 on the link
tion will become apparent from the following descrip
66. Locking means 74 prevents lever 43 from slipping
tion and drawings in which:
off
of stud 63. The opposite end of link 66 is bent and
FIGURE 1 represents a plan view of an automotive
extended through the low-reverse shifting arm 14 and
transmission and the gear train selecting mechanism of
pivotally held thereon by means of lock means 76.
the present invention;
Lever 44 is pivotally mounted on a stud 78 extending
FIGURE 2 represents a partial cross-sectional side
from a bushing 80 by means of lock means 82. Bush
view of the gear selector mechanism;
65 ing 80 is initially slidable on link 84 and may be fric
FIGURE 3 represents a view of the gear selector
tionally locked after it is adjusted against link 84 by
mechanism of FIGURE 2 taken along the line 3-3 there
means of a washer 86 and nut 88 threaded onto a threaded
of in the direction of the arrows;
shaft 90 formed integrally with bushing 80.
FIGURE 4 represents a partial cross sectional view
Link 84 is pivotally mounted at its other end in leg
of the universal mounting of the gear shifting mechanism 70
92 of a bracket 94'and secured therein by a lock washer
taken along line 4-4 of FIGURE 3 in the direction of
96. Bracket 94 is provided with another leg portion
the arrows;
3,022,678
3
4%
V 98 into which link 100 is pivotally mounted in the same
I claim:
manner in which link 84 is mounted and is also piv
otally mounted in the second-high shifting arm 12 and
secured thereby by locking means 102; ' H-shaped
7 A manually operable ?oor mounted ‘gear shift mecha
nism for an automobile comprising a support bracket hav
ing means therein for securing the same to a vehicle ?oor,
bracket 94 is pivotally' mounted at one end on a circular
a shaft pivotally mounted in opposite sides of said bracket,
a sleeve member rotatably supported onrsaid shaft and
havingsocket means disposed on opposite sides thereof,
bearing stud 104 pivotal within the bearing section 106
of the bracket 94 and spring urged on either side by
springs 108 and 110. Stud 104 is provided with a grooved
a gear shift stick having a yoke at one end thereof, bear
end 112 over which is pivotally mounted an arm 114
ing studs extending through the legs of saidv yoke and
secured to the transmission 10 by bolts 116. The other 10 secured in said socket means to pivotally mount said
end of bracket 94 is provided with a resilient rubber grom
> stick, gear train selecting levers pivotally mounted on said
met 118 receiving stud 120 bolted to an arm 122 which
shaft on opposite sides of said stick, one end of said
7 is in turn bolted to a rib 124 forming part of the auto~~
levers having a ?at side with arslot therein adjacent said
motive chassis.
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stick, a pin securcd'to said stick and adapted to ?t into
From FIGURE 6, it is seen that linkages 100 and 66 15 said slots, said pin being su?iciently long to engage each
are separated from each other by means of the bracket 94 ,
of said slots simultaneously at one position of said stick,
which prevents them from being vibrated into contact
with one another which could readily occur should link
spring means engaging said stick and urging said pin into
engagement with one of said slots, and the other end of
age 10010 bev connected directly to linkage 84.v It is fur:
said levers being adapted for operative connection to
ther noted that the vibration of the transmission when 20
transmission shifting arms.
it is in low and reverse gear train is less troublesome
than when it is in second and high 'and, therefore, the
resilient vibration absorbing mounting bracket 94 is pro
vided to interconnect sections 84 and 100 of the second
high linkage.
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7
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References Cited in the ?le of this patent
UNITED STATES PATENTS
2,265,260
2,922,315
Argo __-,_____________ __. Dec. 9, 1941
Primeau _____________ __ Jan. 26, 1960